// RootActivity
    var baseFragment: BaseFragment? = null
    var currentFragmentId: Int = 0

    var isAdvancedFab = true
    var isRotate = false

    @ExperimentalCoroutinesApi
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        ActivityRootBinding.inflate(layoutInflater).apply {
            binding = this
            setContentView(root)

            navController.navInflater.inflate(R.navigation.contact_graph).apply {
                startDestination = R.id.menuContacts
            }
            mainBottomNavigationMenu.setupWithNavController(navController)

            registeredServiceCallInterceptor()
            registerFAB(this)
            registerDynamicLinksListener()
            checkPermissions()
        }
    }

    override fun onResume() {
        super.onResume()
        binding?.apply {
            fabContainer.floatButton.visibility = setViewVisibility(false)
            navController.addOnDestinationChangedListener { _, destination, _ ->
                destinationListener(this, destination)
            }
        }
    }

    override fun onDestroy() {
        super.onDestroy()
        binding = null
    }

    fun fabState(state: FabState) {
        binding?.let { bind ->
            bind.fabContainer.apply {
                when (state) {
                    is FabState.InitState -> {
                        viewAnimation.init(fabOpenKeypad)
                        viewAnimation.init(fabAddContact)
                    }
                    is FabState.OpenState -> {
                        viewAnimation.showIn(fabOpenKeypad)
                        viewAnimation.showIn(fabAddContact)
                    }
                    is FabState.CloseState -> {
                        viewAnimation.showOut(fabOpenKeypad)
                        viewAnimation.showOut(fabAddContact)
                    }
                    is FabState.SimpleState -> Unit
                    is FabState.ResetState -> {
                        viewAnimation.reset(fabOpenKeypad)
                        viewAnimation.reset(fabAddContact)
                        isRotate = viewAnimation.rotateFab(floatButton, false)
                    }
                }
            }
        }
    }

    private fun registerFAB(binding: ActivityRootBinding) {
        binding.apply {
            fabState(FabState.InitState)
            fabContainer.apply {
                floatButton.setOnClickListener { fab -> baseFragment?.floatClick(fab) }
                fabOpenKeypad.setOnClickListener { baseFragment?.keypadClick() }
                fabAddContact.setOnClickListener { baseFragment?.addContactClick() }
            }
        }
    }

    private fun destinationListener(binding: ActivityRootBinding, destination: NavDestination) {
        binding.apply {
            Log.v("RootActivity!!!!", " destinationListener...")
            fabState(FabState.ResetState)
            mainBottomNavigationMenu.visibility = setViewVisibility(
                when (destination.id) {
                    R.id.menuContacts -> true
                    R.id.groupsFragment -> true
                    R.id.menuJournal -> true
                    R.id.menuCalendar -> true
                    R.id.menuSettings -> true
                    else -> false
                }
            )
            fabContainer.floatButton.visibility = setViewVisibility(
                when (destination.id) {
                    R.id.menuContacts -> true
                    R.id.menuCalendar -> true
                    else -> false
                }
            )
            isAdvancedFab = when (destination.id) {
                R.id.groupsFragment -> false
                R.id.filtersContainerFragment -> false
                R.id.menuCalendar -> false
                R.id.calendarDayFragment -> false
                R.id.calendarWeekFragment -> false
                R.id.calendarMonthFragment -> false
                R.id.newEventFragment -> false
                R.id.repeatSettingsFragment -> false
                else -> true
            }
        }
    }

// BaseFragment
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        setupFAB()
        setupUI(view)
        setupObserver()
    }

    override fun onResume() {
        super.onResume()
        activity?.let { fa ->
            if (fa is RootActivity) {
                fa.baseFragment = this
                fa.currentFragmentId = currentDestination()
                fa.fabState(FabState.ResetState)
            }
        }
    }

    open fun floatClick(fab: View) {
        activity?.let { fa ->
            if (fa is RootActivity) {
                if (fa.isAdvancedFab) fa.isRotate = viewAnimation.rotateFab(fab, !fa.isRotate)
                fabAction(fa)
                mainFabNavigate(fa.currentFragmentId)
            }
        }
    }

    open fun addContactClick() {  }
    open fun keypadClick() {  }